2015-01-28 20:14:23 -05:00
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#
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to You under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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2015-02-15 23:29:26 -05:00
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from functools import wraps
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2015-01-28 20:14:23 -05:00
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import uuid
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2015-02-15 23:29:26 -05:00
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def keyword_only(func):
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"""
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A decorator that forces keyword arguments in the wrapped method
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and saves actual input keyword arguments in `_input_kwargs`.
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"""
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@wraps(func)
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def wrapper(*args, **kwargs):
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if len(args) > 1:
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raise TypeError("Method %s forces keyword arguments." % func.__name__)
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wrapper._input_kwargs = kwargs
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return func(*args, **kwargs)
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return wrapper
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2015-01-28 20:14:23 -05:00
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class Identifiable(object):
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"""
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Object with a unique ID.
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"""
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def __init__(self):
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#: A unique id for the object. The default implementation
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2015-04-16 02:49:42 -04:00
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#: concatenates the class name, "_", and 8 random hex chars.
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self.uid = type(self).__name__ + "_" + uuid.uuid4().hex[:8]
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2015-01-28 20:14:23 -05:00
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def __repr__(self):
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return self.uid
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